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A110013
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Squares of the form 4p + 5, where p is a prime.
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4
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25, 49, 81, 121, 169, 289, 361, 441, 529, 729, 961, 1089, 1521, 1681, 1849, 2401, 2809, 3249, 3721, 3969, 5041, 5929, 6241, 6889, 7921, 8281, 8649, 9409, 10201, 11449, 11881, 12321, 12769, 14161, 14641, 16641, 17161, 17689, 18769, 19881, 23409
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OFFSET
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1,1
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COMMENTS
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The sequence contain all squares of greater of twin primes.
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LINKS
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Table of n, a(n) for n=1..41.
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FORMULA
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a(n) = 4*A002327(n) + 5 = A088502(n)^2.
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MATHEMATICA
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Select[4#+5&/@Prime[Range[900]], IntegerQ[Sqrt[#]]&] [From Harvey P. Dale, Jan. 29, 2011]
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CROSSREFS
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Cf. A002327, A002328, A088502.
Cf. A108604.
Sequence in context: A018936 A212190 A110484 * A109861 A106564 A104777
Adjacent sequences: A110010 A110011 A110012 * A110014 A110015 A110016
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KEYWORD
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easy,nonn
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AUTHOR
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Giovanni Teofilatto, Sep 03 2005
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EXTENSIONS
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Corrected and extended by Ray Chandler, Sep 04 2005
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STATUS
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approved
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